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- //shops
- #include<bits/stdc++.h>
- using namespace std;
- multiset<int> s;
- int main()
- {
- int t;
- cin>>t;
- while(t--)
- {
- s.clear();
- int n,k;
- cin>>n>>k;
- for (int i=0;i<n;i++)
- {
- int a[3];
- cin>>a[0]>>a[1]>>a[2];
- sort(a,a+3);
- s.insert(a[0]);
- s.insert(a[1]);
- }
- int ret=0;
- while(k--)
- {
- ret+=*s.begin();
- s.erase(s.begin());
- }
- cout<<ret<<endl;
- }
- }
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